Electronic apparatus, control method, and storage medium

Abstract

An electronic apparatus comprises a connection unit and a conversion unit configured to convert an input voltage into an output voltage that is 1/N times the input voltage. A control unit requests a power supplying apparatus for a third voltage that is N times a first voltage. In a case where an external apparatus is connected to the connection unit after the request for the third voltage, the control unit requests the power supplying apparatus to supply a fourth voltage that is N times a second voltage in response to receiving, from the external apparatus, an instruction for setting the second voltage as a voltage to be output from the electronic apparatus to the external apparatus. The second voltage is higher than the first voltage.

What is claimed is: 
     
         1 . An electronic apparatus comprising at least one processor and/or at least one circuit which function as:
 a connection unit configured to be connected to an external apparatus;   a conversion unit configured to convert an input voltage supplied from a power supplying apparatus into an output voltage that is 1/N times the input voltage, 1/N being predetermined (where N>1), and the output voltage from the conversion unit being output from the connection unit to the external apparatus in a case where the external apparatus has been connected to the connection unit; and   a control unit configured to request the power supplying apparatus for a third voltage that is N times a first voltage,   wherein   in a case where the third voltage has been supplied from the power supplying apparatus in response to the request for the third voltage, the conversion unit converts the third voltage into the first voltage, and the first voltage is output from the connection unit, and   in a case where the external apparatus is connected to the connection unit after the control unit has requested the power supplying apparatus to supply the third voltage, the control unit performs communication with the external apparatus, and requests the power supplying apparatus to supply a fourth voltage that is N times a second voltage in response to receiving, from the external apparatus via the communication, an instruction for setting the second voltage as a voltage to be output from the electronic apparatus to the external apparatus, the second voltage being higher than the first voltage.   
     
     
         2 . The electronic apparatus according to  claim 1 , wherein
 in a case where the third voltage has been supplied from the power supplying apparatus and the external apparatus has been connected to the connection unit, the first voltage is output from the connection unit to the external apparatus, and   in a case where the fourth voltage has been supplied from the power supplying apparatus in response to the request for the fourth voltage, the conversion unit converts the fourth voltage into the second voltage, and the second voltage, in place of the first voltage, is output from the connection unit to the external apparatus.   
     
     
         3 . The electronic apparatus according to  claim 1 , wherein
 in a case where the external apparatus has been disconnected from the connection unit while the input voltage supplied from the power supplying apparatus is the fourth voltage, the control unit requests the power supplying apparatus to supply the third voltage.   
     
     
         4 . The electronic apparatus according to  claim 1 , wherein
 the conversion unit converts the input voltage into the output voltage using a switched capacitor.   
     
     
         5 . The electronic apparatus according to  claim 1 , wherein
 the power supplying apparatus conforms with a USB Power Delivery (USB PD) standard.   
     
     
         6 . The electronic apparatus according to  claim 1 , wherein
 in the communication, the control unit transmits information related to a type of the electronic apparatus to the external apparatus.   
     
     
         7 . The electronic apparatus according to  claim 1 , wherein
 in a case where the fourth voltage has been supplied as the input voltage from the power supplying apparatus in response to the request for the fourth voltage, the conversion unit converts the fourth voltage into the second voltage, and the connection unit outputs the second voltage to the external apparatus.   
     
     
         8 . The electronic apparatus according to  claim 1 , wherein
 the electronic apparatus has a shape that allows the electronic apparatus to be mounted in a battery case of the external apparatus, and the electronic apparatus is mountable in the battery case in place of a battery for the external apparatus.   
     
     
         9 . The electronic apparatus according to  claim 3 , wherein the at least one processor and/or at least one circuit further function as:
 a capacitor configured to be connected to an output side of the conversion unit in parallel with the connection unit, and receive the output voltage of the conversion unit,   wherein in a case where the external apparatus has been disconnected from the connection unit while the input voltage supplied from the power supplying apparatus is the fourth voltage, the control unit performs control to discharge the capacitor until a voltage of the capacitor reaches the first voltage.   
     
     
         10 . A control method executed by an electronic apparatus comprising at least one processor and/or at least one circuit which function as:
 a connection unit configured to be connected to an external apparatus; and   a conversion unit configured to convert an input voltage supplied from a power supplying apparatus into an output voltage that is 1/N times the input voltage, 1/N being predetermined (where N>1), and the output voltage from the conversion unit being output from the connection unit to the external apparatus in a case where the external apparatus has been connected to the connection unit,   the control method comprising:
 requesting the power supplying apparatus for a third voltage that is N times a first voltage, wherein in a case where the third voltage has been supplied from the power supplying apparatus in response to the request for the third voltage, the conversion unit converts the third voltage into the first voltage, and the first voltage is output from the connection unit; and 
 in a case where the external apparatus is connected to the connection unit after requesting the power supplying apparatus to supply the third voltage, performing communication with the external apparatus, and requesting the power supplying apparatus to supply a fourth voltage that is N times a second voltage in response to receiving, from the external apparatus via the communication, an instruction for setting the second voltage as a voltage to be output from the electronic apparatus to the external apparatus, the second voltage being higher than the first voltage. 
   
     
     
         11 . A non-transitory computer-readable storage medium which stores a program for causing an electronic apparatus to execute a control method, the electronic apparatus comprising at least one processor and/or at least one circuit which function as:
 a connection unit configured to be connected to an external apparatus; and   a conversion unit configured to convert an input voltage supplied from a power supplying apparatus into an output voltage that is 1/N times the input voltage, 1/N being predetermined (where N>1), and the output voltage from the conversion unit being output from the connection unit to the external apparatus in a case where the external apparatus has been connected to the connection unit,   the control method comprising:
 requesting the power supplying apparatus for a third voltage that is N times a first voltage, wherein in a case where the third voltage has been supplied from the power supplying apparatus in response to the request for the third voltage, the conversion unit converts the third voltage into the first voltage, and the first voltage is output from the connection unit; and 
 in a case where the external apparatus is connected to the connection unit after requesting the power supplying apparatus to supply the third voltage, performing communication with the external apparatus, and requesting the power supplying apparatus to supply a fourth voltage that is N times a second voltage in response to receiving, from the external apparatus via the communication, an instruction for setting the second voltage as a voltage to be output from the electronic apparatus to the external apparatus, the second voltage being higher than the first voltage. 
   
     
     
         12 . An electronic apparatus comprising at least one processor and/or at least one circuit which function as:
 a connection unit configured to be connected to an external apparatus;   a conversion unit configured to convert an input voltage supplied from a power supplying apparatus into an output voltage that is 1/N times the input voltage (where N>1), 1/N being predetermined, and the output voltage from the conversion unit being output from the connection unit to the external apparatus in a case where the external apparatus has been connected to the connection unit; and   a control unit configured to request the power supplying apparatus for a third voltage that is N times a first voltage,   wherein   in a case where the third voltage has been supplied as the input voltage from the power supplying apparatus in response to the request for the third voltage, the conversion unit converts the third voltage into the first voltage, and the first voltage is output from the connection unit, and   in a case where the external apparatus is connected to the connection unit after the control unit has requested the power supplying apparatus to supply the third voltage, the control unit determines whether the external apparatus supports a second voltage higher than the first voltage, and requests the power supplying apparatus to supply a fourth voltage that is N times the second voltage in a case where it has been determined that the external apparatus supports the second voltage.   
     
     
         13 . A control method executed by an electronic apparatus comprising at least one processor and/or at least one circuit which function as:
 a connection unit configured to be connected to an external apparatus; and   a conversion unit configured to convert an input voltage supplied from a power supplying apparatus into an output voltage that is 1/N times the input voltage (where N>1), 1/N being predetermined, and the output voltage from the conversion unit being output from the connection unit to the external apparatus in a case where the external apparatus has been connected to the connection unit,   the control method comprising:
 requesting the power supplying apparatus for a third voltage that is N times a first voltage, wherein in a case where the third voltage has been supplied as the input voltage from the power supplying apparatus in response to the request for the third voltage, the conversion unit converts the third voltage into the first voltage, and the first voltage is output from the connection unit; and 
 in a case where the external apparatus is connected to the connection unit after requesting the power supplying apparatus to supply the third voltage, determining whether the external apparatus supports a second voltage higher than the first voltage, and requesting the power supplying apparatus to supply a fourth voltage that is N times the second voltage in a case where it has been determined that the external apparatus supports the second voltage. 
   
     
     
         14 . A non-transitory computer-readable storage medium which stores a program for causing an electronic apparatus to execute a control method, the electronic apparatus comprising at least one processor and/or at least one circuit which function as:
 a connection unit configured to be connected to an external apparatus; and   a conversion unit configured to convert an input voltage supplied from a power supplying apparatus into an output voltage that is 1/N times the input voltage (where N>1), 1/N being predetermined, and the output voltage from the conversion unit being output from the connection unit to the external apparatus in a case where the external apparatus has been connected to the connection unit,   the control method comprising:
 requesting the power supplying apparatus for a third voltage that is N times a first voltage, wherein in a case where the third voltage has been supplied as the input voltage from the power supplying apparatus in response to the request for the third voltage, the conversion unit converts the third voltage into the first voltage, and the first voltage is output from the connection unit; and 
 in a case where the external apparatus is connected to the connection unit after requesting the power supplying apparatus to supply the third voltage, determining whether the external apparatus supports a second voltage higher than the first voltage, and requesting the power supplying apparatus to supply a fourth voltage that is N times the second voltage in a case where it has been determined that the external apparatus supports the second voltage.